Sustainable Energy Technologies Ltd.

Sustainable Energy Technologies Ltd.

December 02, 2009 09:35 ET

Sustainable Energy's PARALEX Rooftop PV System to Power 10 Municipal Buildings in Seville Spain

High yield, low voltage system to deliver sustainable solar power to schools, community centers and fire stations throughout Seville

BARCELONA, SPAIN--(Marketwire - Dec. 2, 2009) - Sustainable Energy Technologies Ltd (TSX VENTURE:STG) ("Sustainable Energy" or the "Company") announced today that ISTEM S.A. ("ISTEM") will use the PARALEXTM operating system to power a demonstration of rooftop solar PV on schools, community centers and fire stations in Seville Spain. ISTEM is a subsidiary of Copcisa Industrial SLU based in Barcelona Spain. (See News Release dated May 27, 2008). 

Commissioned by the City Hall of Seville, the "Photovoltaics Roof Project" will install 15 kW rooftop solar power systems on 10 municipal buildings throughout the city. The projects, which are being installed by ISTEM, are scheduled for grid connection in Q1, 2010.

The inherent safety of low solar PV system operating voltages was an important consideration in the selection of the PARALEXTM operating system architecture.

"Low Voltage PV systems are safer and more reliable. Municipal buildings like the ones we are supplying in Seville, which include schools, fire halls, social centers and other publicly owned and operated structures require a special level of safety," said Carlos Alba, Director of Copcisa Industrial and CEO of ISTEM. "The PARALEXTM system will be operating at less than 135 volts, which means it is safe: safe for children, safe for those who work in these buildings, and, god forbid, safe for firemen should an emergency situation occur." 

"We believe that the public segment of the Spanish PV market will be a strong one going forward and we are very happy to be able offer this differentiated and safe solution to the market," Alba added.

Conventional solar PV system architectures require high system operating voltages in order to achieve high conversion efficiencies. With high operating voltages (300v – 600v), there is a risk of serious injury in the case of accidental encounters with a live system. The PARALEXTM operating system enables household level extra low operating voltages to eliminate this risk without sacrificing conversion efficiencies. It is ideal for all applications where public safety is a concern – schools, public buildings, shopping centers, recreational areas etc.

"Seville's Photovoltaics Roof Project demonstrates a growing demand for solar power to meet public energy requirements. Sustainable Energy's PARALEXTM operating system meets this demand and is the perfect fit for municipal projects since it has an inherently safe, low voltage design that addresses concerns of public safety and liability critical for public buildings," said Robert Bucher, President & CEO of Sustainable Energy. "We are pleased to be working with ISTEM to help the city of Seville become a leader in sustainable energy."

PARALEX is a solar power system architecture enabling solar modules to be wired in a parallel array. Using Sustainable Energy's patented inverter technology, the PARALEXTM architecture enables each solar module to operate independently of any other module in the system delivering 5-15% increased energy yield, without the expensive hardware and continuing maintenance cost of micro-inverter products. Every module delivers its maximum power potential while eliminating the string inverter impact of shading, soiling and other real world factors.

A video explaining PARALEXTM and its advantages can be found at A Spanish version can be found

About ISTEM: ISTEM S.A. is the solar PV systems arm of Copcisa Industrial SLU the division of Copcisa Corp. ( focusing on construction, public-private partnerships, private finance initiatives and engineering services. Copcisa Corp is a private corporation headquartered in Barcelona, Spain.

About Sustainable Energy: Sustainable Energy ( designs, manufactures and distributes power inverters for grid-connected solar PV systems. Advanced power inverters are a critical enabler of all modern solar PV power systems converting the direct current ("DC") power output of the solar PV modules into the high quality alternating current ("AC") power required by the power grid. Advanced power inverters also optimize the performance of the solar PV modules and maintain the integrity and safety of the interconnection with the power grid.

In rooftop applications, the extra low operating voltage of the SUNERGY platform enables a system architecture that is inherently safe and that can be installed and maintained by most building trades without the need for PV specialists, significantly reducing the installed system cost and increasing investor yields.

In ground-based applications, multiple SUNERGY inverters offer higher system yield, less downtime and easier installation and maintenance, than larger "central" inverters. For these reasons, multiple smaller inverters like SUNERGY are increasingly displacing central inverters in European ground based applications - where system performance rather than name plate capacity is the driver. 

Sustainable Energy's technologies are the subject of multiple patents issued by and pending with the US Patent and Canadian Patent Offices.

Forward Looking Information

The reader is advised that some of the information herein may constitute forward-looking statements within the meaning assigned by National Instruments 51-102 and other relevant securities legislation. In particular, we include: statements concerning the impact of our technology on solar PV system performance; statements concerning the risks associated with high system operating voltages and statements concerning the potential for sales in the markets we have entered. Forward-looking information is not a guarantee of future performance and involves a number of risks and uncertainties. Many factors could cause the Company's actual results, performance or achievements, or future events or developments, to differ materially from those expressed or implied by the forward-looking information. Readers are cautioned not to place undue reliance on forward-looking information, which speaks only as of the date hereof. The Company does not undertake any obligation to release publicly any revisions to forward- looking information contained herein to reflect events or circumstances that occur after the date hereof or to reflect the occurrence of unanticipated events, except as may be required under applicable securities laws.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

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